Btw, I doubt that Samsung will re-use the K20D/GX20 design.
If Samsung releases their version of the K-7, it is most surely their own design they will use. First, they need to re-design anyway beacuse of the feature set - and they are quite unlikely IMHO to use the same industrial designer as Pentax did for the KxxD-serie (one more famous for Yamaha bicycles if I'm not misstaken now). Samsung has said before that they wish to release their own design, their own style approach - well, I have heard this for several years now ever since they signed with Pentax so it is about time to do it now!
Could very well look like an enlarged NX
Or most likely uses the same industrial designer anyway, same design team.
*if* they release a "GX30", I'm not that sure that they do - even if there are some signs about it. Samsung has said that they will continue with the GX-line. But I'm not sure it will be a K-7 competitior, or if it will be a version of the "K-7 junior" model scheduled for later this year.
We'll just have to wait and see what happens.